CN115954192B

CN115954192B - Inductance, filter, tuning circuit, impedance matching circuit and electronic equipment

Info

Publication number: CN115954192B
Application number: CN202211700274.2A
Authority: CN
Inventors: 周沫; 李男; 王大鹏; 金鹏; 王家耀; 李壮壮; 杜玉欣; 胡臻平; 刘婧迪
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute; Beijing Eswin Computing Technology Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute; Beijing Eswin Computing Technology Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2024-02-02
Anticipated expiration: 2042-12-28
Also published as: CN115954192A

Abstract

The embodiment of the disclosure discloses an inductance, an amplifier, a tuning circuit, an impedance matching circuit and an electronic device, wherein the inductance comprises: the switch selection array, and the first coil, the second coil and the third coil which are sequentially arranged from inside to outside; one end of the first coil and one end of the third coil are external ports of a target inductor, and the other end of the first coil, two ends of the second coil and the other end of the third coil are coupled with the switch selection array; the switch selection array is used for controlling the connection mode among the first coil, the second coil and the third coil so as to generate the target inductance.

Description

Inductance, filter, tuning circuit, impedance matching circuit and electronic equipment

Technical Field

The present disclosure relates to, but not limited to, the field of basic electronic component technology, and in particular, to an inductor, a filter, a tuning circuit, an impedance matching circuit, and an electronic device.

Background

Inductance is an attribute of a closed loop and is a circuit element. When current passes through the coil, a magnetic field is induced in the coil, which in turn generates an induced current that resists the current passing through the coil. It is a circuit parameter describing the effect of induced electromotive force induced in the present coil or in another coil due to a change in coil current. As a low noise passive device, inductance is widely used in circuit designs such as filters, low noise amplifiers (Low Noise Amplifier, LNA) and the like.

In the related art, although the inductor has a tuning function, the inductor is rarely applied to frequency tuning due to the problem of an excessively large area, and the inductor has the problems of an excessively large area, high cost, and the like for an application scene (for example, an impedance matching circuit and a source degeneration inductance type LNA) which needs a plurality of inductors.

Disclosure of Invention

Embodiments of the present disclosure provide at least an inductor, a filter, an amplifier, a tuning circuit, an impedance matching circuit, and an electronic device.

The technical scheme of the embodiment of the disclosure is realized as follows:

embodiments of the present disclosure provide an inductor, the inductor comprising:

the switch selection array, and the first coil, the second coil and the third coil which are sequentially arranged from inside to outside; one end of the first coil and one end of the third coil are external ports of a target inductor, and the other end of the first coil, two ends of the second coil and the other end of the third coil are coupled with the switch selection array;

the switch selection array is used for controlling the connection mode among the first coil, the second coil and the third coil so as to generate the target inductance.

The embodiment of the disclosure provides a filter, which comprises a filter circuit consisting of a capacitor, a resistor and the inductor.

The embodiment of the disclosure provides an amplifier, which comprises an amplifying circuit composed of a capacitor, a transistor and the inductor.

The embodiment of the disclosure provides a tuning circuit comprising the inductor.

The embodiment of the disclosure provides an impedance matching circuit, which comprises a capacitive element and an adjustable circuit connected with the capacitive element, wherein the adjustable circuit comprises the inductor.

The embodiment of the disclosure provides an electronic device, which comprises the inductor.

In an embodiment of the disclosure, the device comprises a magnetic core, a switch selection array, and a first coil, a second coil and a third coil which are sequentially arranged around the magnetic core from inside to outside; one end of the first coil and one end of the third coil are external ports of the inductor, and the other end of the first coil, two ends of the second coil and the other end of the third coil are coupled with the switch selection array; the switch selection array is used for controlling the connection mode among the first coil, the second coil and the third coil so as to generate a target inductance. Therefore, on one hand, the plurality of coils are sequentially arranged from inside to outside, so that the area of the inductor can be greatly reduced, the cost of the inductor can be reduced, and the inductor can be further applied to the scenes such as frequency tuning circuits, radio frequency circuits with higher integration level and the like; on the other hand, the connection mode of the plurality of coils is controlled through the switch selection array so as to generate target inductances with different inductance values, so that the flexibility of the inductance can be improved, and the application range of the inductance can be further widened.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the technical aspects of the disclosure.

Fig. 1 is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure;

fig. 2A is a schematic diagram of a composition structure of an inductor according to an embodiment of the disclosure;

fig. 2B is a schematic diagram of a composition structure of an inductor according to an embodiment of the disclosure;

fig. 2C is a schematic diagram of a composition structure of an inductor according to an embodiment of the disclosure;

fig. 2D is a schematic diagram of a composition structure of an inductor according to an embodiment of the disclosure;

fig. 3A is a schematic diagram of a composition structure of an inductor according to an embodiment of the disclosure;

fig. 3B is a schematic diagram of a composition structure of an inductor according to an embodiment of the disclosure;

fig. 3C is a schematic diagram of a composition structure of an inductor according to an embodiment of the disclosure;

fig. 4A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure;

fig. 4B is a schematic diagram of a connection structure of an inductor according to an embodiment of the disclosure;

Fig. 5A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure;

fig. 5B is a schematic diagram of a connection structure of an inductor according to an embodiment of the disclosure;

fig. 6A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure;

fig. 6B is a schematic diagram of a connection structure of an inductor according to an embodiment of the present disclosure

Fig. 7A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure;

fig. 7B is a schematic diagram of a connection structure of an inductor according to an embodiment of the disclosure;

fig. 7C is a schematic diagram of frequency tuning results for different inductors according to an embodiment of the present disclosure.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure will be further described in detail with reference to the accompanying drawings, and the described embodiments should not be construed as limiting the present disclosure, and all other embodiments obtained by those skilled in the art without making inventive efforts are within the scope of protection of the present disclosure.

In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is to be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with one another without conflict.

In the following description, the terms "first", "second", "third" and the like are merely used to distinguish similar objects and do not represent a particular ordering of the objects, it being understood that the "first", "second", "third" may be interchanged with a particular order or sequence, as permitted, to enable embodiments of the disclosure described herein to be practiced otherwise than as illustrated or described herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of the present disclosure only and is not intended to be limiting of the present disclosure.

Along with the coming of the 5G age, the data transmission rate is greatly improved, in a radio frequency integrated circuit, the carrier frequency of signals is improved to 6 gigahertz (GHz), the inductance value requirement of the inductor is reduced and is approximately in the order of about 1nH (nanohenry), so that more and more circuit design choices integrate the inductor on a chip to improve the chip integration level.

For most frequency selective circuit designs such as impedance matching and filters, frequency tuning is usually achieved by adding a programmable capacitor array, but the capacitance deviation generated by the capacitor can be as high as + -20% in the chip manufacturing process. In the related art, although the inductor has a tuning effect as well, it is rarely used for frequency tuning due to the disadvantage of excessively large area of the inductor. Current tunable inductors are basically composed of multiple inductors connected in series and parallel, and the area of the multiple inductors is obviously unacceptable. Meanwhile, in the scenes of an impedance matching circuit, a common source degeneration inductance type LNA and the like, a plurality of inductors are generally needed, and the plurality of inductors have the problems of overlarge area, overlarge cost and the like.

The embodiment of the disclosure provides an inductor, on one hand, by sequentially arranging a plurality of coils from inside to outside, the area of the inductor can be greatly reduced, so that the cost of the inductor can be reduced, and the inductor can be applied to scenes such as a frequency tuning circuit, a radio frequency circuit with higher integration level and the like; on the other hand, the connection mode of the plurality of coils is controlled through the switch selection array so as to generate target inductances with different inductance values, so that the flexibility of the inductance can be improved, and the application range of the inductance can be further widened.

In the following, the technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the drawings in the embodiments of the present disclosure.

Fig. 1 is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 1, the inductor 10 includes:

a switch selection array 11, and a first coil 12, a second coil 13 and a third coil 14 which are sequentially arranged from inside to outside; wherein one end 121 of the first coil 12 and one end 141 of the third coil 14 are external ports of a target inductance, and the other end 122 of the first coil 12, two ends (131 and 132) of the second coil 13, and the other end 142 of the third coil 14 are coupled with the switch selection array 11;

the switch selection array 11 is configured to control a connection manner among the first coil 12, the second coil 13, and the third coil 14, so as to generate the target inductance.

Here, at least one switch is included in the switch selection array 11. The switch may be any device capable of implementing an on-off function. For example, switching elements, transistors, etc. In implementation, a person skilled in the art may autonomously determine the implementation manner of the switch according to actual requirements, and the embodiments of the present disclosure are not limited.

A coil is generally referred to as a winding of wire in the form of a loop. In practice, the shape of the first, second, and third coils 12, 13, 14 may include, but is not limited to, circular, rectangular, hexagonal, octagonal, and the like.

In some embodiments, parameters in the first coil 12, the second coil 13, and the third coil 14 are different. Wherein the parameter may include, but is not limited to, at least one of inductance, impedance, turns, cross-sectional area, etc.

In some embodiments, one end (121) of the first coil 12 is disposed opposite one end (141) of the third coil 14, the other end (122) of the first coil 12 is disposed opposite one end (131) of the second coil 13, and the other end (132) of the second coil 13 is disposed opposite the other end (142) of the third coil 14. Thus, the area of the inductor can be reduced by arranging the ports of different coils relatively, so that the cost of the inductor can be reduced, and the inductor can be applied to frequency tuning circuits, radio frequency circuits and the like.

In some embodiments, a portion of the second coil 13 is enclosed within the third coil 14, and the first coil 12 is enclosed within the second coil 13. By providing a plurality of coils in such a manner as to surround in this way, the area of the inductor can be reduced, and the cost of the inductor can be reduced.

In some embodiments, the inductor is in a planar spiral configuration. The number of turns of the planar spiral structure may be determined independently according to practical requirements, and the embodiment of the disclosure is not limited, and the number of turns of the planar spiral structure may be defined by the first coil 12, the second coil 13, and the third coil 14, where the first coil 12 includes at least 0.5 turns, the second coil includes at least 1 turn, and the third coil includes at least 0.5 turns. For example, the number of spiral turns may include, but is not limited to, 2 turns, 2.5 turns, 3 turns, 3.5 turns, 4 turns, and the like. For example, in the case where the number of turns of the spiral includes 2 turns, the 2 turns may be 0.5 turns surrounded by the first coil 12, 1 turn surrounded by the second coil 13, and 0.5 turns surrounded by the third coil 14. For another example, in the case where the number of turns of the spiral includes 3 turns, the 3 turns are 1 turn surrounded by the first coil 12, 1.5 turns surrounded by the second coil 13, and 0.5 turn surrounded by the third coil 14. Also for example, in the case where the number of turns of the spiral includes 4 turns, wherein the 4 turns are 2.5 turns surrounded by the first coil 12, 1 turn surrounded by the second coil 13, and 0.5 turn surrounded by the third coil 14.

Fig. 2A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 2A, the inductor includes a switch selection array 11, a first coil 12, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. Wherein, one end 121 of the first coil 12 and one end 141 of the third coil 14 are external ports of the target inductance, and the other end 122 of the first coil 12, one end 131 of the second coil 13, the other end 132 of the second coil 13, and the other end 142 of the third coil 14 are coupled to the switch selection array 11. The inductor is in a planar spiral structure, and the planar spiral structure comprises 0.5 circle surrounded by a first coil 12, 1 circle surrounded by a second coil 13 and 0.5 circle surrounded by a third coil 14.

Fig. 2B is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 2B, the inductor includes a switch selection array 11, a first coil 12, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. Wherein, one end 121 of the first coil 12 and one end 141 of the third coil 14 are external ports of the target inductance, and the other end 122 of the first coil 12, one end 131 of the second coil 13, the other end 132 of the second coil 13, and the other end 142 of the third coil 14 are coupled to the switch selection array 11. The inductor is in a planar spiral structure, and the planar spiral structure comprises 1.5 circles surrounded by a first coil 12, 1 circle surrounded by a second coil 13 and 0.5 circle of spiral turns surrounded by a third coil 14.

Fig. 2C is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 2C, the inductor includes a switch selection array 11, a first coil 12, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. Wherein, one end 121 of the first coil 12 and one end 141 of the third coil 14 are external ports of the target inductance, and the other end 122 of the first coil 12, one end 131 of the second coil 13, the other end 132 of the second coil 13, and the other end 142 of the third coil 14 are coupled to the switch selection array 11. The inductor is in a planar spiral structure, and the planar spiral structure comprises 2.5 circles surrounded by a first coil 12, 1 circle surrounded by a second coil 13 and 0.5 circle of spiral turns surrounded by a third coil 14.

Fig. 2D is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 2D, the inductor includes a switch selection array 11, a first coil 12, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. Wherein, one end 121 of the first coil 12 and one end 141 of the third coil 14 are external ports of the target inductance, and the other end 122 of the first coil 12, one end 131 of the second coil 13, the other end 132 of the second coil 13, and the other end 142 of the third coil 14 are coupled to the switch selection array 11. The inductor is in a planar spiral structure, and the planar spiral structure comprises 3.5 circles surrounded by a first coil 12, 1 circle surrounded by a second coil 13 and 0.5 circle of spiral turns surrounded by a third coil 14.

In some embodiments, the area and inductance of the target inductance are different for different spiral turns. In practice, the area and inductance of the target inductor are positively correlated with the number of turns, i.e., the more turns the area increases, while the inductance increases. Thus, although the area of the target inductor is increased, the structure of the target inductor provided by the embodiment of the disclosure can greatly reduce the area of the inductor in analogy to the inductor of other structures with the same number of turns.

In some embodiments, the switch selection array 11 is further configured to: controlling the series connection between the first coil 12 and the third coil 14 to generate the target inductance; wherein the other end 122 of the first coil 12 is connected to the other end 142 of the third coil 14; and/or controlling the first coil 12, the second coil 13 and the third coil 14 to be sequentially connected in series so as to generate the target inductance; wherein the other end 122 of the first coil 12 and the other end 142 of the third coil 14 are respectively connected with the second coil 13; and/or controlling mutual inductance among the first coil 12, the second coil 13 and the third coil 14 to generate the target inductance.

Here, the connection modes of the first coil 12, the second coil 13, and the third coil 14 can be controlled by the switch selection array 11 to enter different operation modes. The operation modes may include, but are not limited to, a single inductance mode, a double inductance mode, and the like.

The single inductance mode characterizes the target inductance as a variable inductance value inductance. In practice, the target inductance provides two ports, namely: one end 121 of the first coil 12 and one end 141 of the third coil 14.

For example, the target inductance may be an inductance formed by a series connection between the first coil 12 and the third coil 14, for example, an inductance formed by the first coil 12 and the third coil 14. For another example, the target inductance may be at least one inductance formed by the first coil 12, the second coil 13, and the third coil 14, for example, an inductance formed by sequentially connecting the first coil 12, the second coil 13, and the third coil 14 in series.

Fig. 3A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 3A, the inductor includes a switch selection array 11, a first coil 12, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. Wherein, one end 121 of the first coil 12 and one end 141 of the third coil 14 are external ports of the target inductance, and the other end 122 of the first coil 12 is controlled to be connected with the other end 142 of the third coil 14 through the switch selection array 11, so that the first coil 12 and the third coil 14 are connected in series to generate the target inductance.

Fig. 3B is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 3B, the inductor includes a switch selection array 11, a first coil 12, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. One end 121 of the first coil 12 and one end 141 of the third coil 14 are external ports of the target inductor, and the switch selection array 11 controls the other end 122 of the first coil 12 to be coupled with one end 131 of the second coil 13, and the other end 132 of the second coil 13 to be coupled with the other end 142 of the third coil 14, so that the first coil 12, the second coil 13 and the third coil 14 are sequentially connected in series to generate the target inductor.

Fig. 3C is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 3C, the inductor includes a switch selection array 11, a first coil 12, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. One end 121 of the first coil 12 and one end 141 of the third coil 14 are external ports of the target inductor, the other end 132 of the second coil 13 is coupled to the other end 122 of the first coil 12 through the switch selection array 11, and one end 131 of the second coil 13 is connected to the other end 142 of the third coil 14, so that the first coil 12, the second coil 13 and the third coil 14 are sequentially connected in series to generate the target inductor.

In some embodiments, the switch selection array 11 is further configured to: controlling negative coupling between the first coil 12 and the second coil 13, and between the second coil 13 and the third coil 14 to generate the target inductance; wherein the other end 122 of the first coil 12 is connected to one end 131 of the second coil 13, and the other end 132 of the second coil 13 is connected to the other end 142 of the third coil 14; and/or controlling positive coupling between the first coil 12 and the second coil 13, and between the second coil 13 and the third coil 14 to generate the target inductance; wherein the other end 122 of the first coil 12 is connected to the other end 132 of the second coil 13, and one end 131 of the second coil 13 is connected to the other end 142 of the third coil 14.

Here, the negative coupling characterizes the opposite current direction of the two coils, where the two coils form the smallest inductance value, i.e.: the difference in inductance values of the two coils. For example, as shown in fig. 3B, a negative coupling is formed between the first coil 12 and the second coil 13, and a negative coupling is also formed between the second coil 13 and the third coil 14. The positive coupling characterizes that the current directions of the two coils are the same, and at the moment, the inductance value formed by the two coils is the largest, namely: the sum of the inductance values of the two coils. For example, as shown in fig. 3C, positive coupling is formed between the first coil 12 and the second coil 13, and positive coupling is also formed between the second coil 13 and the third coil 14.

In an embodiment of the present disclosure, the target inductance is generated by controlling negative coupling between the first coil and the second coil, and between the second coil and the third coil; and/or controlling positive coupling between the first coil and the second coil and between the second coil and the third coil to generate the target inductance. Therefore, different inductors are generated by utilizing various coupling modes among different coils, the flexibility of the inductors can be improved, and the inductors can be applied to different frequency tuning circuits, so that the application range of the inductors can be widened.

The dual inductance mode characterizes the target inductance as being generated by two mutually coupled inductances. In practice, the target inductance may include four ports, namely: one end 121 of the first coil 12, one end 141 of the third coil 14, and two ends are determined from the remaining four ends. The remaining four ends include the other end 122 of the first coil 12, one end 131 of the second coil 13, the other end 132 of the second coil 13, and the other end 142 of the third coil 14. For example, a first inductance is generated in series between the first coil 12 and the second coil 13, and a mutual inductance is formed between the third coil 14 to generate the target inductance. In some embodiments, the current direction of the two inductors may be the same or opposite, i.e.: positive and negative coupling can be formed between the two inductors. In implementation, the current direction of the same inductor is different, and the inductor can be realized by turning two ports of the inductor. For example, the target inductance is generated by forming mutual inductance between the second inductance and the first coil 12, wherein the second inductance is formed by connecting the second coil 13 and the third coil 14 in series. In the case where the second inductor represents that the one end 131 of the second coil 13 is connected to the other end 142 of the third coil 14, the current direction of the second inductor flows from the other end 132 of the second coil 13 to the one end 141 of the third coil 14, and in practice, by turning the other end 132 of the second coil 13 and the one end 141 of the third coil 14, it is possible to realize that the current direction of the second inductor flows from the one end 141 of the third coil 14 to the other end 132 of the second coil 13.

In an embodiment of the disclosure, the target inductance is generated by controlling the series connection between the first coil and the third coil; and/or controlling the first coil, the second coil and the third coil to be sequentially connected in series so as to generate the target inductance; and/or controlling mutual inductance among the first coil, the second coil and the third coil to generate the target inductance. Therefore, the flexibility of the inductor can be improved by controlling different connection modes of the plurality of coils to generate single inductor or double inductors, so that the inductor can be applied to frequency tuning circuits, multi-inductor serial-parallel circuits and the like, and the application range of the inductor can be further widened.

In some embodiments, the switch selection array 11 is further configured to: the first coil 12 and the second coil 13 are controlled to be connected in series to form a first inductance, and the first inductance and the third coil 14 are controlled to form a mutual inductance to form the target inductance.

Here, the target inductance is generated by forming mutual inductance between two sections of inductances, namely: a first inductance and a third coil 14. The first inductance refers to one end 121 of the first coil 12 to one end 131 (121-131) of the second coil 13, or one end 121 of the first coil 12 to the other end 132 (121-132) of the second coil 13. The target inductance includes four ports, namely: one end 121 of the first coil 12, both ends (141 and 142) of the third coil 14, and one end (131 or 132) of the second coil 13.

In some embodiments, the switch selection array 11 is also used for at least one of: controlling the first coil 12 and the second coil 13 to form negative coupling to generate the first inductance; and/or controlling the positive coupling between the first coil 12 and the second coil 13 to generate the first inductance.

Here, a negative coupling is formed between the first coil 12 and the second coil 13, characterizing that the current flow between the first coil 12 and the second coil 13 is opposite, i.e.: the other end 122 of the first coil 12 is connected to one end 131 of the second coil 13. The target inductance is generated by forming mutual inductance between two sections of the first coil 12 from one end 121 to the other end 132 (121-132) of the second coil 13 and the third coil 14 from one end 141 to the other end 142 (141-142) of the third coil 14. The target inductance includes four ports, namely: one end 121 of the first coil 12, both ends (141 and 142) of the third coil 14, and the other end 132 of the second coil 13.

Positive coupling is formed between the first coil 12 and the second coil 13, which characterizes the same direction of current flow between the first coil 12 and the second coil 13, i.e.: the other end 122 of the first coil 12 is connected to the other end 132 of the second coil 13. The target inductance is generated by forming mutual inductance between two sections of the first coil 12 from one end 121 to the other end 132 (121-132) of the second coil 13 and the third coil 14 from one end 141 to the other end 142 (141-142) of the third coil 14. The target inductance includes four ports, namely: one end 121 of the first coil 12, both ends (141 and 142) of the third coil 14, and one end 131 of the second coil 13.

In the embodiment of the disclosure, the first inductance is generated by controlling the series connection between the first coil and the second coil, and the mutual inductance is formed between the first inductance and the third coil, so as to generate the target inductance. Thus, on one hand, different inductances are generated by controlling different coupling modes between the first coil and the second coil, so that the flexibility of the inductances can be improved; on the other hand, the mutual inductance is formed between the first inductor and the third coil to generate the target inductor, so that the area of the inductor is reduced, the target inductor can be applied to a circuit with multiple inductors in series-parallel combination, and the flexibility of the inductor can be further improved.

In some embodiments, the switch selection array 11 is further configured to: the second coil 13 and the third coil 14 are controlled to be connected in series to form a second inductance, and the second inductance and the first coil 12 are controlled to form a mutual inductance to form the target inductance.

Here, the target inductance is generated by forming mutual inductance between two sections of inductances, namely: a second inductance and a first coil 12. The second inductance refers to one end 131 of the second coil 13 to one end 141 (131-141) of the third coil 14, or the other end 132 of the second coil 13 to one end 141 (132-141) of the third coil 14. The target inductance includes four ports, namely: both ends (121 and 122) of the first coil 12, one end (141) of the third coil 14, and one end (131 or 132) of the second coil 13.

In some embodiments, the switch selection array 11 is further configured to: controlling the second coil 13 and the third coil 14 to form negative coupling to generate the second inductance; and/or controlling the positive coupling between the second coil 13 and the third coil 14 to generate the second inductance.

Here, a negative coupling is formed between the second coil 13 and the third coil 14, which characterizes the opposite direction of the current between the second coil 13 and the third coil 14, i.e.: the other end 142 of the third coil 14 is connected to the other end 132 of the second coil 13. The target inductance is generated by forming mutual inductance between two sections of the inductance from one end 131 of the second coil 13 to one end 141 (131-141) of the third coil 14 and from one end 121 of the first coil 12 to the other end 122 (121-122) of the first coil 12. The target inductance includes four ports, namely: both ends (121 and 122) of the first coil 12, one end 141 of the third coil 14, and one end 131 of the second coil 13.

Positive coupling is formed between the second coil 13 and the third coil 14, which characterizes the same direction of current flow between the second coil 13 and the third coil 14, i.e.: the other end 142 of the third coil 14 is connected to one end 131 of the second coil 13. The target inductance is generated by forming mutual inductance between the two inductance sections from the other end 132 of the second coil 13 to the one end 141 (132-141) of the third coil 14 and from the one end 121 of the first coil 12 to the other end 122 (121-122) of the first coil 12. The target inductance includes four ports, namely: both ends (121 and 122) of the first coil 12, one end 141 of the third coil 14, and the other end 132 of the second coil 13.

In an embodiment of the disclosure, the target inductance is generated by controlling the series connection between the second coil and the third coil to generate a second inductance and controlling the mutual inductance between the second inductance and the first coil. On the one hand, different inductances are generated by controlling different coupling modes between the second coil and the third coil, so that the flexibility of the inductances can be improved; on the other hand, the mutual inductance is formed between the second inductor and the first coil to generate the target inductor, so that the area of the inductor is reduced, the target inductor can be applied to a circuit with multiple inductors in series-parallel combination, and the flexibility of the inductor can be further improved.

In some embodiments, the switch selection array 11 includes a first switch, a second switch, and a third switch.

Here, one end of the first switch is connected to the other end 122 of the first coil 12, and the other end of the first switch is connected to one end 131 of the second coil 13. In practice, the connection between the first coil 12 and the second coil 13 is controlled by the opening and closing of the first switch, namely: the first coil 12 is connected to the second coil 13 in the case where the first switch is closed, whereas the first coil 12 is not connected (disconnected) to the second coil 13 in the case where the first switch is not closed (opened).

One end of the second switch is connected to the other end 132 of the second coil 13, and the other end of the second switch is connected to the other end 142 of the third coil 14. In practice, the connection between the second coil 13 and the third coil 14 is controlled by the opening and closing of the second switch, namely: the second coil 13 is connected to the third coil 14 in the case where the second switch is closed, whereas the second coil 13 is not connected (disconnected) to the third coil 14 in the case where the second switch is not closed (opened).

One end of the third switch is connected to the other end 132 of the first coil 12, and the other end of the third switch is connected to the other end 142 of the third coil 14. In practice, the connection between the first coil 12 and the third coil 14 is controlled by the opening and closing of the third switch, namely: the first coil 12 is connected to the third coil 14 in the case where the third switch is closed, whereas the first coil 12 is not connected (disconnected) to the third coil 14 in the case where the third switch is not closed (opened).

Fig. 4A is a schematic structural diagram of an inductor according to an embodiment of the present disclosure, and as shown in fig. 4A, the inductor includes a switch selection array 11, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. The switch selection array 11 includes a first switch S1, a second switch S2, and a third switch S3, wherein:

One end of the first switch S1 is connected to the other end 122 of the first coil 12, the other end of the first switch S1 is connected to the one end 131 of the second coil 13, and in operation, the connection between the first coil 12 and the second coil 13 is controlled by opening or closing the first switch S1;

one end of the second switch S2 is connected to the other end 132 of the second coil 13, the other end of the second switch S2 is connected to the other end 142 of the third coil 14, and in operation, the connection between the second coil 13 and the third coil 14 is controlled by opening or closing the second switch S2;

one end of the third switch S3 is connected to the other end 122 of the first coil 12, the other end of the third switch S3 is connected to the other end 142 of the third coil 14, and in operation, the connection between the first coil 12 and the third coil 14 is controlled by opening or closing the third switch S3.

In some embodiments, with both the first switch and the second switch closed, and the third switch not closed, a negative coupling is formed between both the first coil 12 and the second coil 13, and between the second coil 13 and the third coil 14.

Here, the current direction between the first coil 12 and the second coil 13 is opposite, and the current direction between the second coil 13 and the third coil 14 is also opposite, that is: the first coil 12, the second coil 13 and the third coil 14 are sequentially connected in series to generate the target inductance.

In some embodiments, positive coupling is formed between the first coil 12 and the third coil 14 with the third switch closed and both the first switch and the second switch open.

Here, the current direction between the first coil 12 and the third coil 14 is the same, that is: the first coil 12 and the third coil 14 are connected in series to generate the target inductance.

In some embodiments, with the first switch closed and the second and third switches both open, a negative coupling is formed between the first coil 12 and the second coil 13 to generate a first inductance, and a mutual inductance is formed between the first inductance and the third coil 14.

Here, the current direction between the first coil 12 and the second coil 13 is opposite, i.e.: the first coil 12 and the second coil 13 are connected in series to form a first inductor; a mutual inductance is formed between the first inductance and the third coil 14 to generate the target inductance.

In some embodiments, with the second switch closed and both the first switch and the third switch open, a negative coupling is formed between the second coil 13 and the third coil 14 to generate a second inductance, and a mutual inductance is formed between the second inductance and the first coil 12.

Here, the current direction between the second coil 13 and the third coil 14 is opposite, that is: the second coil 13 and the third coil 14 are connected in series to form a second inductor; a mutual inductance is formed between the second inductance and the first coil 12 to generate the target inductance.

Fig. 4B is a schematic diagram of a connection structure of an inductor according to an embodiment of the disclosure, as shown in fig. 4B, the inductor includes a first end P1 (corresponding to the end 121 of the first coil 12), a second end P2 (corresponding to the end 141 of the third coil 14), a coil L1 (corresponding to the first coil 12), a coil L2 (corresponding to the second coil 13), a coil L3 (corresponding to the third coil 14), a switch K1 (corresponding to the first switch), a switch K2 (corresponding to the second switch), a switch K3 (corresponding to the third switch), wherein L1 includes a P1 end and a C2 end (corresponding to the other end 122 of the first coil 12), L2 includes a C1 end (corresponding to the one end 131 of the second coil 13) and a C3 end (corresponding to the other end 132 of the second coil 13), and L3 includes a P2 end and a C4 end (corresponding to the other end 142 of the third coil 14). When in implementation, the method comprises the following steps:

under the conditions of K1 closing, K2 closing and K3 opening, L1, L2 and L3 are sequentially connected in series, wherein negative coupling is formed between L1 and L2, and negative coupling is also formed between L2 and L3;

With K1 open, K2 open, K3 closed, L1 and L3 are connected in series, wherein positive coupling is formed between L1 and L3;

under the conditions that K1 is closed, K2 is opened and K3 is opened, a first inductor is formed between L1 and L2 in series, mutual inductance is formed between the first inductor and L3, and negative coupling is formed between L1 and L2;

under the conditions that K1 is opened, K2 is closed and K3 is opened, a second inductor is formed between L2 and L3 in series, mutual inductance is formed between the second inductor and L1, and negative coupling is formed between L2 and L3.

In an embodiment of the disclosure, the switch selection array includes a first switch, a second switch, and a third switch; one end of the first switch is connected with the other end of the first coil, and the other end of the first switch is connected with one end of the second coil; one end of the second switch is connected with the other end of the second coil, and the other end of the second switch is connected with the other end of the third coil; one end of the third switch is connected with the other end of the first coil, and the other end of the third switch is connected with the other end of the third coil. Therefore, the connection mode of a plurality of coils is controlled by opening and closing a plurality of switches so as to generate different single inductances and double inductances, the flexibility of the inductances can be improved, the inductances can be applied to frequency tuning, multi-inductance series-parallel circuits and the like, and the application range of the inductances can be further widened.

In some embodiments, the switch selection array 11 further comprises a fourth switch.

Here, one end of the fourth switch is connected to the other end 122 of the first coil 12, and the other end of the fourth switch is connected to the other end 132 of the second coil 13. In practice, the connection between the first coil 12 and the second coil 13 is controlled by the opening and closing of the fourth switch, namely: the first coil 12 is connected to the second coil 13 in the case where the fourth switch is closed, whereas the first coil 12 is not connected (disconnected) to the second coil 13 in the case where the fourth switch is not closed (opened).

Fig. 5A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, and as shown in fig. 5A, the inductor includes a switch selection array 11, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. The switch selection array 11 includes a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4, wherein:

one end of the third switch S3 is connected to the other end 122 of the first coil 12, the other end of the third switch S3 is connected to the other end 142 of the third coil 14, and in operation, the connection between the first coil 12 and the third coil 14 is controlled by opening or closing the third switch S3;

one end of the fourth switch S4 is connected to the other end 122 of the first coil 12, the other end of the fourth switch S4 is connected to the other end 142 of the second coil 13, and in operation, the connection between the first coil 12 and the second coil 13 is controlled by opening or closing the fourth switch S4.

In some implementations, positive coupling is formed between the first coil and the third coil with both the second switch and the fourth switch closed and neither the first switch nor the third switch closed.

In some embodiments, with only the fourth switch closed, a positive coupling is formed between the first coil and the second coil to generate a first inductance, and a mutual inductance is formed between the first inductance and the third coil.

Here, the current direction between the first coil 12 and the second coil 13 is the same, that is: the first coil 12 and the second coil 13 are connected in series to form a first inductor; a mutual inductance is formed between the first inductance and the third coil 14 to generate the target inductance.

Fig. 5B is a schematic diagram of a connection structure of an inductor according to an embodiment of the disclosure, as shown in fig. 5B, the inductor includes a first end P1 (corresponding to the end 121 of the first coil 12), a second end P2 (corresponding to the end 122 of the third coil 14), a coil L1 (corresponding to the first coil 12), a coil L2 (corresponding to the second coil 13), a coil L3 (corresponding to the third coil 14), a switch K1 (corresponding to the first switch), a switch K2 (corresponding to the second switch), a switch K3 (corresponding to the third switch) and a switch K4 (corresponding to the fourth switch), wherein L1 includes a P1 end and a C2 end (corresponding to the end 122 of the first coil 12), L2 includes a C1 end (corresponding to the end 131 of the second coil 13) and a C3 end (corresponding to the end 132 of the second coil 13), and L3 includes a P2 end and a C4 end (corresponding to the end 142 of the third coil 14). When in implementation, the method comprises the following steps:

Under the conditions of K1 closing, K2 closing, K3 opening and K4 opening, L1, L2 and L3 are sequentially connected in series, wherein negative coupling is formed between L1 and L2, and negative coupling is also formed between L2 and L3;

with K1 open, K2 open, K3 closed, K4 open, L1 and L3 are connected in series, wherein positive coupling is formed between L1 and L3;

with K1 open, K2 closed, K3 open, K4 closed, L1 and L3 are connected in series, wherein positive coupling is formed between L1 and L3;

under the conditions of K1 closing, K2 opening, K3 opening and K4 opening, a first inductor is formed between L1 and L2 in series, mutual inductance is formed between the first inductor and L3, and negative coupling is formed between L1 and L2;

under the conditions of K1 opening, K2 closing, K3 opening and K4 opening, a second inductor is formed between the L2 and the L3 in series, mutual inductance is formed between the second inductor and the L1, and negative coupling is formed between the L2 and the L3;

under the conditions of K1 opening, K2 opening, K3 opening and K4 closing, a first inductor is formed between the L1 and the L2 in series, mutual inductance is formed between the first inductor and the L3, and positive coupling is formed between the L1 and the L2.

In an embodiment of the present disclosure, the switch selection array further includes a fourth switch, one end of the fourth switch is connected to the other end of the first coil, and the other end of the fourth switch is connected to the other end of the second coil; positive coupling is formed between the first coil and the third coil when both the second switch and the fourth switch are closed and neither the first switch nor the third switch are closed; with only the fourth switch closed, a positive coupling is formed between the first coil and the second coil to generate a first inductance, and a mutual inductance is formed between the first inductance and the third coil. Therefore, the connection mode of the plurality of coils is controlled by opening and closing the fourth switch to generate single inductance or double inductances, the flexibility of the inductance can be improved, the inductance can be applied to frequency tuning, multi-inductance series-parallel circuits and the like, and the application range of the inductance can be further widened.

In some embodiments, the switch selection array 11 further comprises a fifth switch.

Here, one end of the fifth switch is connected to one end 131 of the second coil 13, and the other end of the fifth switch is connected to the other end 142 of the third coil 14. In practice, the connection between the second coil 13 and the third coil 14 is controlled by the opening and closing of the fifth switch, namely: the second coil 13 is connected to the third coil 14 in the case where the fifth switch is closed, whereas the second coil 13 is not connected (disconnected) to the third coil 14 in the case where the fifth switch is not closed (opened).

Fig. 6A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 6A, the inductor includes a switch selection array 11, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. The switch selection array 11 includes a first switch S1, a second switch S2, a third switch S3, and a fifth switch S5, wherein:

one end of the fifth switch S5 is connected to one end 131 of the second coil 13, the other end of the fifth switch S5 is connected to the other end 142 of the third coil 14, and in operation, the connection between the second coil 13 and the third coil 14 is controlled by opening or closing the fifth switch S5.

In some implementations, positive coupling is formed between the first coil and the third coil with both the first switch and the fifth switch closed and both the second switch and the third switch open.

In some embodiments, with only the fifth switch closed, a positive coupling is formed between the second coil and the third coil to generate a second inductance, and a mutual inductance is formed between the second inductance and the first coil.

Here, the current direction between the second coil 13 and the third coil 14 is the same, that is: the second coil 13 and the third coil 14 are connected in series to form a second inductor; a mutual inductance is formed between the second inductance and the first coil 12 to generate the target inductance.

Fig. 6B is a schematic diagram of a connection structure of an inductor according to an embodiment of the disclosure, as shown in fig. 6B, the inductor includes a first end P1 (corresponding to the end 121 of the first coil 12), a second end P2 (corresponding to the end 122 of the third coil 14), a coil L1 (corresponding to the first coil 12), a coil L2 (corresponding to the second coil 13), a coil L3 (corresponding to the third coil 14), a switch K1 (corresponding to the first switch), a switch K2 (corresponding to the second switch), a switch K3 (corresponding to the third switch) and a switch K5 (corresponding to the fifth switch), wherein L1 includes a P1 end and a C2 end (corresponding to the end 122 of the first coil 12), L2 includes a C1 end (corresponding to the end 131 of the second coil 13) and a C3 end (corresponding to the end 132 of the second coil 13), and L3 includes a P2 end and a C4 end (corresponding to the end 142 of the third coil 14). When in implementation, the method comprises the following steps:

Under the conditions of K1 closing, K2 closing, K3 opening and K5 opening, L1, L2 and L3 are sequentially connected in series, wherein negative coupling is formed between L1 and L2, and negative coupling is also formed between L2 and L3;

with K1 open, K2 open, K3 closed, K5 open, L1 and L3 are connected in series, wherein positive coupling is formed between L1 and L3;

with K1 closed, K2 open, K3 open, K5 closed, L1 and L3 are connected in series, wherein positive coupling is formed between L1 and L3;

under the conditions of K1 closing, K2 opening, K3 opening and K5 opening, a first inductor is formed between L1 and L2 in series, mutual inductance is formed between the first inductor and L3, and negative coupling is formed between L1 and L2;

under the conditions of K1 opening, K2 closing, K3 opening and K5 opening, a second inductor is formed between the L2 and the L3 in series, mutual inductance is formed between the second inductor and the L1, and negative coupling is formed between the L2 and the L3;

under the conditions of K1 opening, K2 opening, K3 opening and K5 closing, a second inductor is formed between the L2 and the L3 in series, mutual inductance is formed between the second inductor and the L1, and positive coupling is formed between the L2 and the L3.

In some implementations, the switch selection array 11 includes a first switch, a second switch, a third switch, a fourth switch, and a fifth switch.

In an embodiment of the present disclosure, the switch selection array further includes a fifth switch, one end of the fifth switch is connected to one end of the second coil, and the other end of the fifth switch is connected to the other end of the third coil; with both the first switch and the fifth switch closed and both the second switch and the third switch open, positive coupling is formed between both the first coil and the third coil; with only the fifth switch closed, a positive coupling is formed between the second coil and the third coil to generate a second inductance, and a mutual inductance is formed between the second inductance and the first coil. Therefore, the connection mode of the plurality of coils is controlled by opening and closing the fifth switch to generate single inductance or double inductances, the flexibility of the inductance can be improved, the inductance can be applied to frequency tuning, multi-inductance series-parallel circuits and the like, and the application range of the inductance can be further widened.

Fig. 7A is a schematic diagram of a composition structure of an inductor according to an embodiment of the present disclosure, as shown in fig. 7A, the inductor includes a switch selection array 11, and a first coil 12, a second coil 13, and a third coil 14 sequentially arranged from inside to outside. The switch selection array 11 includes a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, and a fifth switch S5, wherein:

one end of the fourth switch S4 is connected to the other end 122 of the first coil 12, the other end of the fourth switch S4 is connected to the other end 142 of the second coil 13, and in operation, the connection between the first coil 12 and the second coil 13 is controlled by opening or closing the fourth switch S4;

one end of the fifth switch S5 is connected to the other end 132 of the second coil 13, the other end of the fifth switch S5 is connected to the other end 142 of the third coil 14, and in operation, the connection between the second coil 13 and the third coil 14 is controlled by opening or closing the fifth switch S5.

Fig. 7B is a schematic diagram of a connection structure of an inductor according to an embodiment of the disclosure, as shown in fig. 7B, the inductor includes a first end P1 (corresponding to the end 121 of the first coil 12), a second end P2 (corresponding to the end 141 of the third coil 14), a coil L1 (corresponding to the first coil 12), a coil L2 (corresponding to the second coil 13), a coil L3 (corresponding to the third coil 14), a switch K1 (corresponding to the first switch), a switch K2 (corresponding to the second switch), a switch K3 (corresponding to the third switch) a switch K4 (corresponding to the fourth switch), and a switch K5 (corresponding to the fifth switch), wherein L1 includes a P1 end and a C2 end (corresponding to the other end 122 of the first coil 12), L2 includes a C1 end (corresponding to the end 131 of the second coil 13) and a C3 end (corresponding to the other end 132 of the second coil 13), and L3 includes a P2 end and a C4 end 142 corresponding to the third coil 14. When in implementation, the method comprises the following steps:

under the conditions of K1 closing, K2 closing, K3 opening, K4 opening and K5 opening, L1, L2 and L3 are sequentially connected in series, wherein negative coupling is formed between L1 and L2, and negative coupling is also formed between L2 and L3;

under the conditions of K1 opening, K2 opening, K3 opening, K4 closing and K5 closing, L1, L2 and L3 are sequentially connected in series, wherein positive coupling is formed between L1 and L2, and positive coupling is also formed between L2 and L3;

With K1 open, K2 open, K3 closed, K4 open, K5 open, L1 and L3 are connected in series, wherein positive coupling is formed between L1 and L3;

with K1 open, K2 closed, K3 open, K4 closed, K5 open, L1 and L3 are connected in series, wherein positive coupling is formed between L1 and L3;

in the case of K1 closed, K2 open, K3 open, K4 open, K5 closed, L1 and L3 are connected in series, wherein positive coupling is formed between L1 and L3;

under the conditions of K1 closing, K2 opening, K3 opening, K4 opening and K5 opening, a first inductor is formed between L1 and L2 in series, mutual inductance is formed between the first inductor and L3, and negative coupling is formed between L1 and L2;

under the conditions of K1 opening, K2 closing, K3 opening, K4 opening and K5 opening, a second inductor is formed between L2 and L3 in series, mutual inductance is formed between the second inductor and L1, and negative coupling is formed between L2 and L3;

under the conditions of K1 opening, K2 opening, K3 opening, K4 closing and K5 opening, a first inductor is formed between L1 and L2 in series, mutual inductance is formed between the first inductor and L3, and positive coupling is formed between L1 and L2;

under the conditions of K1 opening, K2 opening, K3 opening, K4 opening and K5 closing, a second inductor is formed between the L2 and the L3 in series, mutual inductance is formed between the second inductor and the L1, and positive coupling is formed between the L2 and the L3.

Fig. 7C is a schematic diagram of frequency tuning results of different inductors according to an embodiment of the present disclosure, where, as shown in fig. 7C, the abscissa represents a frequency, the ordinate represents an input return loss, and the input return loss represents a ratio between a reflected power and an incident power, and when implemented, the smaller the input return loss is, the better. Wherein:

for a point P1 in the curve 71, the frequency corresponding to the point P1 is the resonance center frequency of the target inductance, where the target inductance represents that the first coil 12, the second coil 13, and the third coil 14 are sequentially connected in series, and positive coupling is formed between the first coil 12 and the second coil 13, and between the second coil 13 and the third coil 14;

for a point P2 in the curve 72, the frequency corresponding to the point P2 is the resonance center frequency of the target inductance, where the target inductance represents the series connection between the first coil 12 and the third coil 14, and positive coupling is formed between the first coil 12 and the third coil 14;

for point P3 in the curve 73, the frequency corresponding to the point P3 is the resonance center frequency of the target inductance, where the target inductance represents the series connection among the first coil 12, the second coil 13, and the third coil 14 in turn, and negative coupling is formed between the first coil 12 and the second coil 13, and between the second coil 13 and the third coil 14.

In some embodiments, the inductor further comprises a magnetic core, the shape of which may include, but is not limited to, cylindrical, bar, cube, etc. The magnetic core refers to a sintered magnetic metal oxide composed of various iron oxide mixtures. In operation, the first coil 12, the second coil 13 and the third coil 14 are sequentially arranged around the magnetic core from inside to outside or sequentially wound around the magnetic core from inside to outside. In implementation, a person skilled in the art may autonomously determine a connection manner between the magnetic core and each coil according to actual requirements, and the embodiments of the present disclosure are not limited.

The embodiment of the disclosure provides an amplifier, which comprises an amplifying circuit composed of a capacitor, a transistor and any one of the inductors.

Here, the amplifier is a device capable of amplifying the voltage or power of an input signal. In implementation, the sizes and numbers of the capacitors, the transistors, and the inductors may be set independently according to actual requirements, which is not limited in the embodiments of the disclosure.

The embodiment of the disclosure provides a filter, which comprises a filter circuit consisting of a capacitor, a resistor and any one of the inductors.

Here, the filter may effectively filter out a frequency point of a specific frequency or a frequency other than the frequency point in the power line to obtain a power signal of the specific frequency, or eliminate the power signal after the specific frequency. In implementation, the size and number of the capacitor, the resistor, and the inductor can be set independently according to actual requirements, and the embodiments of the disclosure are not limited.

Embodiments of the present disclosure provide a tuning circuit comprising any one of the inductances described above.

Here, the tuning circuit may be used to tune a radio frequency signal, an antenna, or the like. In implementation, the tuning circuit may further include a capacitor, a switch, a power supply, etc., which can be set by a person skilled in the art according to actual needs, and the embodiments of the present disclosure are not limited.

An embodiment of the present disclosure provides an impedance matching circuit, including a capacitive element, and an adjustable circuit connected to the capacitive element, where the adjustable circuit includes any one of the above inductors.

Here, the capacitive element may include, but is not limited to, a variable capacitance, a fixed capacitance, and the like. The adjustable circuit adjusts the impedance of the adjustable circuit by adjusting the inductance, so that the impedance reaches an optimal matching state, and the sensitivity and the accuracy of adjustment are improved. In some embodiments, an adjustable capacitance, an adjustable inductance, etc. may also be included in the adjustable circuit. In implementation, the number and the size of the inductance and the capacitance in the adjustable circuit can be set independently according to actual requirements, and the embodiment of the disclosure is not limited.

The embodiment of the disclosure provides an electronic device, which comprises any one of the inductors.

Here, the electronic device may be a terminal having a display driving chip, a notebook computer, a tablet computer, a desktop computer, a set-top box, a base station, a mobile device (e.g., a mobile phone, a portable music player, a personal digital assistant, a dedicated messaging device, a portable game device), or the like.

In some implementations, the electronic device further includes a processor. Processors may include, but are not limited to, application processors (Application Processor, AP), modem processors, graphics processors (Graphics Processing Unit, GPU), image signal processors (Image Signal Processor, ISP), neural-network processors (Neural-network Processing Unit, NPU), controllers, video codecs, digital signal processors (Digital Signal Processor, DSP), baseband, and/or Radio Frequency Integrated Circuits (RFIC), among others. The controller can generate operation control signals according to the instruction operation codes and the time sequence signals to finish the control of instruction fetching and instruction execution. In some embodiments, the baseband and radio frequency integrated circuits may be integrated in one integrated circuit. In some embodiments, the baseband and radio frequency circuits may be separate devices.

It should be noted here that: the above description of the amplifier, filter, tuning circuit, impedance matching circuit and electronic device embodiments is similar to that of the inductor embodiments described above, with similar benefits as the inductor embodiments. For technical details not disclosed in the embodiments of the amplifier, filter, tuning circuit, impedance matching circuit and electronic device of the present disclosure, please refer to the description of the embodiments of the inductor of the present disclosure for understanding.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus may be implemented in other manners. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units; can be located in one place or distributed to a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.

The foregoing is merely an embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think about the changes or substitutions within the technical scope of the present disclosure, and should be covered by the protection scope of the present disclosure.

Claims

1. An inductor, the inductor comprising:

The switch selection array is used for controlling the connection mode among the first coil, the second coil and the third coil so as to enter a target working mode to generate the target inductance; the target working mode is a working mode corresponding to the connection mode in a single-inductance mode and a double-inductance mode, the single-inductance mode represents that the target inductance comprises two external ports, and the double-inductance mode represents that the target inductance comprises four external ports.

2. The inductor of claim 1, wherein the switch selection array is further configured to at least one of:

controlling the series connection between the first coil and the third coil to generate the target inductance; wherein the other end of the first coil is connected with the other end of the third coil;

controlling the first coil, the second coil and the third coil to be sequentially connected in series so as to generate the target inductance; the other end of the first coil and the other end of the third coil are respectively connected with the second coil;

and controlling mutual inductance among the first coil, the second coil and the third coil to generate the target inductance.

3. The inductor of claim 2, wherein the switch selection array is further configured to at least one of:

controlling negative coupling between the first coil and the second coil and between the second coil and the third coil to generate the target inductance; the other end of the first coil is connected with one end of the second coil, and the other end of the second coil is connected with the other end of the third coil;

controlling positive coupling between the first coil and the second coil and between the second coil and the third coil to generate the target inductance; the other end of the first coil is connected with the other end of the second coil, and one end of the second coil is connected with the other end of the third coil.

4. The inductor of claim 2, wherein the switch selection array is further configured to at least one of:

controlling the series connection between the first coil and the second coil to generate a first inductance, and controlling the mutual inductance between the first inductance and the third coil to generate the target inductance;

and controlling the series connection between the second coil and the third coil to generate a second inductance, and controlling the mutual inductance between the second inductance and the first coil to generate the target inductance.

5. The inductor of claim 4, wherein the switch selection array is further configured to at least one of:

controlling the first coil and the second coil to form negative coupling to generate the first inductance; the other end of the first coil is connected with one end of the second coil;

controlling positive coupling between the first coil and the second coil to generate the first inductance; the other end of the first coil is connected with the other end of the second coil.

6. The inductor of claim 4, wherein the switch selection array is further configured to at least one of:

controlling a negative coupling between the second coil and the third coil to generate the second inductance; the other end of the third coil is connected with the other end of the second coil;

controlling positive coupling between the second coil and the third coil to generate the second inductance; the other end of the third coil is connected with one end of the second coil.

7. The inductor of any one of claims 1-6, wherein the switch selection array comprises a first switch, a second switch, and a third switch;

One end of the first switch is connected with the other end of the first coil, and the other end of the first switch is connected with one end of the second coil;

one end of the second switch is connected with the other end of the second coil, and the other end of the second switch is connected with the other end of the third coil;

one end of the third switch is connected with the other end of the first coil, and the other end of the third switch is connected with the other end of the third coil.

8. The inductor as claimed in claim 7, wherein,

negative coupling is formed between the first coil and the second coil, and between the second coil and the third coil, with both the first switch and the second switch being closed, and the third switch not being closed;

with the third switch closed and both the first switch and the second switch open, positive coupling is formed between both the first coil and the third coil;

with the first switch closed and the second and third switches both open, a negative coupling is formed between the first and second coils to generate a first inductance, and a mutual inductance is formed between the first inductance and the third coil;

With the second switch closed and both the first switch and the third switch open, a negative coupling is formed between the second coil and the third coil to generate a second inductance, and a mutual inductance is formed between the second inductance and the first coil.

9. The inductor of claim 7, wherein the switch selection array further comprises a fourth switch, one end of the fourth switch being connected to the other end of the first coil, the other end of the fourth switch being connected to the other end of the second coil;

positive coupling is formed between the first coil and the third coil when both the second switch and the fourth switch are closed and neither the first switch nor the third switch are closed;

with only the fourth switch closed, a positive coupling is formed between the first coil and the second coil to generate a first inductance, and a mutual inductance is formed between the first inductance and the third coil.

10. The inductor of claim 7, wherein the switch selection array further comprises a fifth switch, one end of the fifth switch being connected to one end of the second coil, the other end of the fifth switch being connected to the other end of the third coil;

With both the first switch and the fifth switch closed and both the second switch and the third switch open, positive coupling is formed between both the first coil and the third coil;

with only the fifth switch closed, a positive coupling is formed between the second coil and the third coil to generate a second inductance, and a mutual inductance is formed between the second inductance and the first coil.

11. The inductor of any one of claims 1-6, wherein one end of the first coil is disposed opposite one end of the third coil, the other end of the first coil is disposed opposite one end of the second coil, and the other end of the second coil is disposed opposite the other end of the third coil.

12. The inductor of claim 11, wherein a portion of the second coil is enclosed within the third coil and the first coil is enclosed within the second coil.

13. A filter comprising a filter circuit comprising a capacitor, a resistor and an inductance according to any one of claims 1 to 12.

14. A tuning circuit comprising an inductance as claimed in any one of claims 1 to 12.

15. An impedance matching circuit comprising a capacitive element, and an adjustable circuit coupled to the capacitive element, the adjustable circuit comprising the inductance of any one of claims 1 to 12.

16. An electronic device comprising an inductance as claimed in any one of claims 1 to 12.